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Yoshihama Formation Kase, 1979

Invalid synonym: Tsukihama Formation

• Type locality: Yoshihama, Kitakami town, Ishinomaki city, Miyagi prefecture
• Coherent formation
• Cretaceous

• Lithofacies: Sandstone
• Lithofacies (Minor): Sandy shale

• Thickness: ca. 130 - 370 m
• Upper limit: Conformity (Tatsugami Formation)
• Lower limit: Unconformity (Nagao Formation)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Yoshihama - Shirahama - Oppa, Kitakami town, Ishinomaki city, Miyagi pref.

• Takizawa et al. (1990) Geology of the Toyoma District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 126p. (in Japanese with English abstract 8p.)